• Country
• Germany

• Manufacturer / Brand
• Wendt KG, Werner; Kiel u.a.

• Year
• 1956 ??

• Category
• Medical Technology

• Radiomuseum.org ID
• 121460

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• 4

• Semiconductors
• OC70 OC71 OC71 OC71

• Main principle
• Audio-Amplification; 4 AF stage(s)

• Wave bands
• - without

• Details
• Hearing aid

• Power type and voltage
• Dry Batteries / 3 Volt

• Loudspeaker
• - only for Earphone!

• from Radiomuseum.org
• Model: Hörgerät Wendton WT540/II - Wendt KG, Werner; Kiel u.a.

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Notes
• Hörgerät mit 4 Transistoren, Stufen RC gekoppelt.

• Literature/Schematics (1)
• H.G. Mende, Leitfaden der Transistortechnik, Franzis Verlag München, 1.Auflage 1959 S.217

• Literature/Schematics (2)
• R. Rost, Kristalloden Technik, Verlag Wilhelm Ernst & Sohn Berlin, 2.Auflage 1956 S.227

• Author
• Model page created by Marc Gianella. See "Data change" for further contributors.

• Other Models

• Here you find 6 models, 5 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Wendt KG, Werner; Kiel u.a.